TrueNAS SCALETrueNAS Nightly Development Documentation
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S.M.A.R.T. Service Screen

The Services > S.M.A.R.T. screen displays settings to configure when S.M.A.R.T. tests run and when to trigger alert warnings and send emails.

SMARTSystemServicesGeneralOptionsSCALE

NameDescription
Check IntervalEnter the time in minutes for smartd to wake up and check if any tests are configured to run.
Power ModeSelect the power mode from the dropdown list. Options are Never, Sleep, Standby or Idle. S.M.A.R.T. only tests when the Power Mode is Never.
DifferenceEnter a number of degrees in Celsius. S.M.A.R.T. reports if a drive temperature changes by N degrees Celsius since the last report.
InformationalEnter a threshold temperature in Celsius. S.M.A.R.T. sends a message with a LOG_INFO log level if the temperature is above the threshold.
CriticalEnter a threshold temperature in Celsius. S.M.A.R.T. sends a message with a LOG_CRIT log level and send an email if the temperature is above the threshold.

Click Save after changing any settings.